Android SDK is the software development kit for developers who want to build applications for Android platform devices. The kit contains all the tools that a developer would require to create, test and debug their Android apps.Android SDK is open-source, easy to install and use, and is compatible with all operating systems (Linux, Windows, and Mac OS).
In terms of pricing, setup cost, and licensing for Android SDK, it is quite cheap; I did not spend much and even received vouchers for Gemini Pro.
It is an open-source platform.
There is no licensing because it is open source.
I am using the free version of Android SDK.